| 1,1,1-TCA |
1,1,1-trichloroethane |
 |
Atmospheric residence time |
| ABC |
Activity-based costing |
| ACGIH |
American Conference of Governmental Industrial
Hygienists, Inc. |
| APDR |
Acute potential dose rate |
| API |
American Petroleum Institute |
| AQUIRE |
Aquatic Information Retrieval Toxicity Data Base
|
| AsF |
Assessment factor |
| ASTM |
American Society for Testing and Materials |
| AT |
Averaging time |
| AT123D |
Analytical Transient One-, Two-, and
Three-Dimensional Simulation and Groundwater Transport Model |
| ATSDR |
Agency for Toxic Substance and Disease Registry
|
| BACT |
Best available control technology |
| BAT |
Best available control technology economically
practical |
| BCF |
Bioconcentration factor |
| BCT |
Best conventional pollution control technology
|
| BNA |
Bureau of National Affairs |
| BOD |
Biochemical oxygen demand |
| bp |
Boiling point |
| BPT |
Best practicable control technology currently
available |
| BTU |
British thermal unit |
| BW |
Body weight |
| C |
Carbon |
| CAA |
Clean Air Act |
| CAS RN |
Chemical Abstracts Service Registry Number |
| CC |
Concern concentration |
| CCRIS® |
Chemical Carcinogenesis Research Information
System Online Data Base |
| CEB |
Chemical Engineering Branch |
| CERCLA |
Comprehensive Environmental Response,
Compensation, and Liability Act |
| CFC |
Chlorofluorocarbon |
| CFC-113 |
Chlorofluorocarbon-113 |
| CFR |
Code of Federal Regulations |
|
| CHEMID® |
Chemical Identification online chemical dictionary
|
| CH4 |
Methane |
| CO |
Carbon monoxide |
| COC |
Concentration of concern |
| COD |
Chemical oxygen demand |
| CO2 |
Carbon dioxide |
| CPSA |
Consumer Product Safety Act |
| CR |
Contact rate |
| CTSA |
Cleaner Technologies Substitute Assessment |
| CWA |
Clean Water Act |
| UTM-TOX |
Unified Transport Model for Toxicants |
| DART® |
Developmental and Reproductive Toxicology Online
Data Base |
| DfE |
Design for the Environment (term coined by
industry) |
| DFE |
Design for the Environment (term used by EPA OPPT)
|
| EC |
Effective concentrations |
| EC50 |
Effects concentration |
| ECO CC |
Ecotoxicity concern concentration |
| ED |
Exposure duration |
| EETD |
Economics, Exposure and Technology Division of EPA
|
| EF |
Exposure frequency |
| EFDB |
Environmental Fate Data Base |
| ELR |
Environmental Law Reporter |
| EMICBACK |
Environmental Mutagen Information Center Backfile
Online Genotoxicity Data Base |
| EPCRA |
Emergency Planning and Community Right-To-Know Act
|
| EPI |
Estimation Programs Interface Chemical Properties
Model |
| ER |
Environment Reporter |
| ETICBACK |
Environmental Teratology Information Center
Backfile Online Data Base |
| EXAMS |
Exposure Analysis Modeling System |
| FATE |
Environmental Fate Constants Information System
Data Base |
| FC |
Fluorocarbon |
| Fed Reg |
Federal Register |
| FFDCA |
Federal Food, Drug, and Cosmetic Act |
| FIFRA |
Federal Insecticide, Fungicide, and Rodenticide
Act |
| FMEA |
Failure mode and effects analysis |
| GAMS |
GEMS Atmospheric Modeling Subsystem |
| GATT |
General Agreement on Tariffs and Trade |
| GEMS/PCGEMS |
Graphical Exposure Modeling System/Personal
Computer Graphical Exposure Modeling System - Chemical Fate and Hansport Models
|
| GENE-TOX |
Genetic Toxicology Online Data Base |
| H2O |
Water |
| Hc |
Henry's Law Constant |
| HCl |
Hydrochloric acid |
| H |
Hydrogen |
| HAD |
Health Assessment Documents |
| HAPs |
Hazardous air pollutants |
| HAZOP |
Hazard and operability study |
| HCFC |
Hydrochlorofluorocarbon |
| Hcl |
Hydrochloric acid |
| HEC |
Human equivalent concentration |
| HED |
Human equivalent dose |
| HERD |
Health and Environmental Review Division of EPA
|
| HFC |
Hydrofluorocarbon |
| HHE |
Health Hazard Evaluations |
| HI |
Hazard index |
| HMTA |
Hazardous Materials Transportation Act |
| hp |
Horsepower |
| HSA |
Hazardous Substances Act |
| HSDB |
Hazardous Substance Data Bank Online Data Base
|
| HQ |
Hazard quotient |
| IARC |
International Agency for Research on Cancer |
| IDLH |
Immediately dangerous to life or health |
| IMES |
Integrated Model Evaluation System |
| IRIS |
Integrated Risk Information System Online Data
Base |
| IRR |
Internal rate of return |
| ISCLT |
Industrial Source Complex Long-Term Atmospheric
Fate and Transport Model |
| ISCST |
Industrial Source Complex Short-Term Atmospheric
Fate and Transport Model |
| kd |
Direct aqueous photolysis rate constant |
| kg |
Kilograms |
| KOH |
Hydroxyl radical rate constant |
| kO3 |
Ozone rate constant |
| Ka, pKa |
Ionization or acid dissociation constant |
| Kd |
Soil or sediment sorption coefficient |
| Koc |
Organic carbon partition coefficient |
| Kom |
Organic matter sorption coefficient |
| Kow |
Octanol/water partition coefficient |
| kW |
Kilowatt |
| kWh |
Kilowatt hour |
| LAER |
Lowest achievable emission rate |
| LADC |
Lifetime average daily concentration |
| LADD |
Lifetime average daily dose |
| LC |
Lethal concentration |
| LCA |
Life cycle assessment |
| LD |
Lethal dose |
| LEL |
Lower explosive limit |
| LOEC |
Lowest-observed effects concentration |
| LOAEL |
Lowest-observed adverse-effect level |
| mp |
Melting point |
| MACT |
Maximum achievable control technology |
| MATC |
Maximum allowable toxicant concentration |
| MCCEM |
Multi-Chamber Concentration and Exposure Model
|
| MCLs |
Maximum contaminant levels for drinking water |
| MCLG |
Maximum contaminant level goal for drinking water
|
| MF |
Modifying factor |
| MLD |
Million liters per day |
| MOE |
Margin of exposure |
| MSDS |
Material Safety Data Sheet |
| MW |
Molecular weight |
| Na |
Sodium |
| NAAQS |
National Ambient Air Quality Standard |
| NAFTA |
North American Free Trade Agreement |
| NEC |
No effect concentration |
| NESHAP |
National Emissions Standards for Hazardous Air
Pollutants |
| NIOSH |
National Institute of Occupational Safety and
Health |
| NO2 |
Nitrogen dioxide |
| NOAEL |
No-observed adverse effect level |
| NOEC |
No-observed effects concentration |
| NOEL |
No-observed effects level |
| NPDES |
National Pollutant Discharge Elimination System
|
| NPV |
Net present value |
| NTP |
National Toxicology Program |
| O2 |
Oxygen |
| O3 |
Ozone |
| OPPT |
Office of Pollution Prevention and Toxics |
| OR |
Odds ratio |
| OSHA |
Occupational Safety and Health Administration |
| P |
Parachor |
| PDM |
Probabilistic Dilution Model |
| PDR |
Potential dose rate |
| PEL |
Permissible exposure limit |
| PMR |
Proportionate mortality ratio |
| PM - 10 |
Particulate matter |
| POTWs |
Publicly owned treatment works |
| PPE |
Personal protective equipment |
| ppm |
Parts per million |
| PRZM |
Pesticide Root Zone Model |
| PTPLU |
Point Plume Groundwater Model |
| Pv |
Vapor pressure |
| PV |
Present value |
| PWB |
Printed wiring board |
| QSARs |
Quantitative structure-activity relationships
|
| RACT |
Reasonably achievable control technology |
| RCRA |
Resource Conservation and Recovery Act |
| REL |
Recommended exposure limit |
| RfC |
Reference concentration |
| RfD |
Reference dose |
| RQ |
Reportable quantity |
| RTECS® |
Registry of Toxic Effects of Chemical Substances
Online Data Base |
| S |
Water solubility |
| SAR |
Structure-activity relationship |
| SARA |
Superfund Amendments and Reauthorization Act |
| SCIES |
Screening Consumer Inhalation Exposure Software
|
| SESOIL |
Seasonal Soil Compartment Model |
| SIC |
Standard industrial classification |
| SIP |
State Implementation Plan |
| SMR |
Standardized mortality ratio |
| SO2 |
Sulfur dioxide |
| SPAI |
Screen Printing Association International |
| SPTF |
Screen Printing Technical Foundation |
| SRC |
Syracuse Research Corporation |
| STEL |
Short-term exposure limit |
| STP |
Sewage Treatment Plant fugacity model |
| SUS |
Saybolt Universal Seconds |
| SWIP |
Survey Waste Injection Program |
| t½ |
Half-life |
| TCA |
Total cost assessment |
| TCLP |
Toxicity characteristic leaching procedure |
| THRs |
Toxic and Hazardous Reviews |
| TLV |
Threshold limit value |
| TLV-C |
Threshold limit value - ceiling |
| TLV-STEL |
Threshold limit value - short-term exposure limit
|
| TOXNET |
The National Library of Medicine's Toxicology Data
Network |
| TSCA |
Toxic Substances Control Act |
| TSDF |
Treatment, storage, and disposal facility |
| TWA |
Time-weighted-average |
| UEL |
Upper explosive limit |
| UF |
Uncertainty factor |
| U.L. |
Underwriters Laboratory |
| U.S.C. |
United States Code |
| U.S.C.A. |
United States Code Annotated |
| U.S.C.S. |
United States Code Service |
| UTM-TOX |
Unified Transport Model for Toxicants |
| UV |
Ultraviolet |
| VOC |
Volatile organic compound |
